Nut-lock.



PATENTE-D FEB.19, 1907.

I. W. ZOLLERS. NUT LOCK.

APPLICATION TILED NOV. 30, 1906.

bolt.

' Figure 1 is a orally-projecting eniargements and useful lmproven on UTNTTE STATEd FRANK W. ZOLLEBS, OF! IDULTERS, PE NNSYL-Wld L i.

Specification cl Letters Patent. Application filed November 30,1906. Serial No. 345,831.

350. 844,643. Patented Feb. 19, 1907.

To all whom it may e/mcerrt: l the cavity provides an annular shoulder 10, Be it known that I, F RANK \V. Zonnnns, a 1 adapted to be engaged by an annular flange citizen of the United States. residing at Coul- 11,'Iorniod upon the outer end of the dog 6. ters, in the county of Allegheny and State of The latter corresponds in shape to that of the Pennsylvania, have nvented certain new reduced inner portion 8 of the cavity, in ts in Xut-liocks, of 3 which portion it slides, and its flange or head which the following is a specification, rel'eri 11 corresponds in diameter to that of the ence being had therein to the accompanying outer portion J of said. cavity. The dog 6 is drawings. f square or of polygonal shape in cross-section,

My invention rel tes to in'ip'rovelnents in so-that it will not rotatc; but any other nut-locks, and more particularly to those by means may be provided for accomplishing means of which the nut is looked upon the 1 the sarnepurpose. The inner end ot the dog bolt.

, 6 is tapered or beveled, as shown at 12, so as The object of the invention is to provide a to ht the xi-shaped grooves 5 in the bolt.

device of this character which will be of sirn- It will be noted upon reference to Fig. 2 ple construction. so that it may be manufacthat one wall of each of the grooves 5 is ratured ate small cost, which will be durable dially disposed and that its opposite wall is in use and etl'ective in accomplishingits puri inclined in the direction of the turns of the pose, and which may be readily unlocked threads of the bolt, so that as the nut is when it is desired to remove the nut from the screwed upon the bolt said inclined walls of i the grooves will successively engage, the beveled end of the dogand force it outwardly and that when the nut is turned in the re,- verse direction to unscrew it from the bolt the radial orvcrtical'wall of one of the grooves The above and other objects are accomplished by the improved construction shown i in the accompanying drawings, in whichlongitudinal section througl-i 1 the threaded end 01' a bolt and my improved will engage the dog, and nut-locking means. Fig. 2 is a transverse tion of the nut in that direction. The dog section taken on the plane indicated by the i the grooves by a coil line 2 2 in Fig. 1, and Fig. 3 is a perspective the large portion 9 of view of the nut removed from the bolt. the outer end or head In "the drawings the numeral 1 denotes a lug let, of soft metal, nut of any suitable form and construction l which is inserted in t e outer end of the cavwhich is. locked upon a bolt 2 in accordance ity 7. 'lhisplug 14 not only closes the outer with my invention, This bolt may'Yilso be end of the .cavity, and thus protects the of any suitable form and construction; but, spring and the pawl from moisture, but also as shown, it has screw-threads at one of its i holdsthe parts in their proper positions. ends and a head 3 at its opposite end. The I From the foregoing it will be observed that bolt 2 is preferably formed with the usual lati this improved nut-lock may be produced at 4 adjacent to a comparatively small cost. The grooves may be easily and inexpensively cut or otherwise forrned inthe bolt, and the cavity may be similarly provided in the nut' The dog In the practlce of'my invention I form in and spring may be easily inserted in the cavthe threaded end of the bolt 2 one or more i ity and the latter then closed by the plug 14, longitudinally-extendin grooves 5, which l of lead or other soft metal. The dog 6 will are preferably V-shaped in cross-section, as allow-the nut tobe turned upon the bolt until shown in Fig. 2, and which are adapted to be it'is tight thereon, and it will also allow it to engaged by a spring pawl or dogfi, which is be retightened from time 'totime; but as arranged ina cavity 7 in the nut 1. This 1 soon as the nut is-turned in the reverse direccavity 7 is preferably arranged at a slight tion said do will prevent this rotation. angle withrespect to the face of the nut u )OD. Should it be desired to remove the but, the which it opens, and its inner end 8,which atplug 14 may be'readily removed from the ter'opens into the threaded aperture in the cavity, so that the spring and dog; will drop nut, is of less width than that of its outer end out of the same, and thus free the nut.

or portion 9. This reduction in the size of l Having thus described my invention, what is forced inwardly into spring 13, arranged in the cavity 7 between 11 of the dog and a the head 3, so that the bolt will be prevented from rotating in the object or objects through which it passes.

thus prevent rota- 1 claim as new and desire to secure by'Letters Patent of the United States, is

The combination with a bolt having a threaded end formed with an annular series of longitudinally-extending grooves, each of the latter having a radially-extending wall and an inclined wall, of a nut formed with an angularly disposed, transverselyextending cavity having an enlarged cylindrical outer portion opening upon one of the side faces of the nut and a reduced inner portion opening into the threaded aperture in said nut, the enlarged outer portion of said cavity forming an annular shoulder therein, a dog slidably mounted in the reduced inner portion of said cavity and having a beveled inner end to enter the grooves in said bolt, the outer end of said dog' being formed with an annular flange corresponding, in diameter to that of the outer portion of said cavity in which it is adapted to slide, a coil-spring arranged in the large outer portion of said cavity and engaged with the outer end of said dog for forcing the latter inwardly and holding its flange upon the annular shoulder in said cavity, and a plug of soft metal driven-into the enlarged outer end of said cavity and engaged with the outer end of said spring to retain the same therein and to efi'ectively seal said cavity, substantially as shown and described.

In testimony whereof I hereunto afiix my signature in. presence of two witnesses;

FRANK W. ZOLLERS.

Witnesses I ALBERT QREER, CHARLES .ooRE, 

